Creating the perfect Glow-in-the-Dark Rice Krispies Treats is a breeze if you follow these simple steps:

1. Prepare Your Pan: Grease a 9×13 inch pan lightly with cooking spray or butter to prevent sticking.

2. Melt Butter: In a large pot over low heat, melt the butter slowly.

3. Add Marshmallows: Once the butter is melted, add the marshmallows to the pot. Stir continuously until fully melted and smooth.

4. Incorporate Tonic Water: Remove the pot from heat and stir in the tonic water. The ingredients should blend smoothly.

5. Add Food Coloring: If you’re using food coloring, add it to the melted marshmallow mixture now, mixing until evenly colored.

6. Mix in Rice Krispies: Gradually add the Rice Krispies cereal to the pot. Stir gently until all the cereal is coated in the marshmallow mix.

7. Transfer to Pan: Pour the mixture into the prepared pan. Using a greased spatula, gently press the mixture down to create an even layer. Avoid compressing too much, as this will ensure a chewy texture.

8. Set: Allow the treats to set at room temperature for about 30 minutes or until firm.

9. Cut and Wrap: Once set, cut them into squares or rectangles. If desired, wrap them in wax paper for individual servings or store them in an airtight container.

10. Test the Glow: To see the effects, turn off the lights in a dark room and watch your creations glow beautifully!

These steps will guide you to creating wonderful Glow-in-the-Dark Rice Krispies Treats, guaranteed to become a favorite at any gathering.